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Kubota G2000 Troubleshooting

The Kubota G2000 garden tractor was manufactured between 1989 and 1997. The components of Kubota G2000 powerline system: Kubota WG750 4-cycle 3-cylinder water cooled gasoline engine and hydrostatic transmission with infinite forward and reverse gears.

A 45.2 cubic inches (740 cc) engine has a cylinder bore of 2.68" (68 mm), piston stroke of 2.68" (68 mm), and rated power of 18.8 hp (14 kW). Max forward speed - 8.1 mph (13 km/h), maximum reverse speed - 3.7 mph (6 km/h).

The Kubota G2000 was equipped with a manual steering system, internal expanding shoe brakes, 16x6.50-8 front tires, and 23x8.50-12 or 23x10.50-12 rear tires. The wheel base is 50" (1270 mm). Compatible attachments for the tractor: a 48" mid-mount 3-blade Kubota RC48 mower deck with cutting height of 1.4-3.5" (35-90 mm), 54" mid-mount 3-blade Kubota RC54 mower deck with cutting height of 1.5-4.0" (37-102 mm), 60" mid-mount 3-blade Kubota RC60 mower deck with cutting height of 1.5-4.0" (37-102 mm), 48" front-mount Kubota TG2001 blade, and 54" front-mount Kubota TG2754 blade.

Engine Troubleshooting
Engine will not start or hard to start
Empty fuel tank - Fill it up
Wrong grade of gasoline - Use quality gasoline
Air trapped in fuel system - Bleed air
Spark plug wire connection are damaged - Inspect spark plug wiring connection, change or repair
Damaged spark plug - Change spark plug as required
Fuel filter is plugged - Change fuel filter
Safety contact for brake pedal defective - Install new part
Incorrect carburetor adjustment - Adjust carburetor idle mixture screw
Weak cylinder compression - Inspect cylinder block and change worn parts
Incorrectly adjusted or damaged throttle cable - Change cable or adjust properly
Unstable engine running
Air intake screen is blocked - Need to clean or wash
Defective ignition - Check ignition and replace faulty components
Stuck or faulty choke cable - Change or clean the cable
Air filter element is clogged - Replace or clean air filter
Fuel pump is damaged or dirty - Check fuel pump and change if required
Engine starts and stops suddenly
Faulty spark plug - Change spark plug as required
Faulty or clogged carburetor - Clean or change carburetor
Damaged ignition coil - Change ignition coil as required
Loose or broken valve springs - New valve springs need to be installed
Valves sticking - Service the valves
Engine overheated
Engine oil level low - Checking oil level and add if necessary
Engine is running overloaded - Reduce load
Clogged cooling fins - Clean and wash as required
Too lean carburetor mixture - Adjust carburetor correctly
Improper ignition timing - Adjust ignition timing as required
Valve setting is wrong - Valves needs to be adjusted properly
Engine knocking or noise
Low octane gasoline - Use correct gasoline
Excessive engine load - Reduce the load
Not enough engine oil - Need to add engine oil
Incorrect low idle setting - Test and adjust
Fuel pump is dirty or defective - Service or replace fuel pump
Main bearings or crankshaft failure - Replace crankshaft or bearings
Valve clearance is incorrect - Adjust to proper valve clearance
Damaged piston rings or cylinder bore - Replace defective components
Engine loses power
Carburetor is improperly adjusted or clogged - Clean or properly adjust carburetor
Dirty air filter element - Service or change air filter
Dirty or damaged fuel pump - Check fuel pump and replace if necessary
Defective ignition - Inspect ignition system and change faulty parts
Defective cylinder head gasket - Replace the head gasket
Stuck or burned valves - Replace or clean valves
Worn or damaged push rod - Change push rod
Faulty cylinder block components - Change defective components
Excessive fuel consumption
Choke opening is not full - Replace or adjust choke cable
Carburetor main jet adjustment is incorrect - Adjust it correctly
Spark plug is defective or loose - Re-tighten or replace spark plug
Valves are stuck, burned, or worn - Service or replace valves
Worn rings, piston, or sleeve - Replace defective components
Valve clearance is improper - Check and adjust
Excessive engine oil consumption
Damaged gaskets or seals - Change worn parts according to specifications
Valve stems or guides are damaged - Change the valves
Piston rings are stuck or worn - Replace piston rings
Scuffed cylinder liner or piston - Inspect piston and liner, change as required
Breather pipe or hose is blocked - Clean or change

Hydrostatic Transmission Troubleshooting
HST transmission makes excessive noise
Worn or unadjusted speed control linkage - Adjust or repair linkage
Excessive loading - Reduce the load is required
Low transmission oil level or contaminated oil - Add oil to the correct level or fill the transmission with fresh oil
Transmission components are damaged or worn - Replace or repair defective components
Difficult shifting
Shift linkage is rusty or worn - Lubricate or replace the linkage
Stuck or defective hydrostatic pump - Replace or repair pump
Faulty or misadjusted transmission shift control parts - Change or adjust correctly
Loss of power
Transmission fluid level is low - Need to add transmission fluid
Faulty or worn drive sheave - Change sheave
Shifting linkage is broken or misadjusted - Replace or adjust linkage
Speed control linkage is defective or unadjusted - Adjust or repair linkage
Transmission leakage
Transmission seals or gaskets are broken - Install new seals or gaskets
Final drive shaft is leaking - Install new shaft seals
Cracked transmission case - Change broken case

Mower Deck Troubleshooting
Mower vibration is excessive
Damaged or clogged mower drive pulley - Service or replace pulley
Worn or loose drive belt - Change belt or adjust belt tension
Not balanced or bent mower blades - Balance or replace blades
Blade mounting bolts are loose - Bolts need to be tightened
Discharge chute is regularly plugged
High ground speed - Operate at slower speed
Grass is too high - Adjust mower to lower cutting height
Engine rpm is too low - Open throttle fully
Cutting level is too low - Need to set high cutting height
Drive belt installed improperly - Install drive belt as required
Lawn mower leaving uncut grass
Cutting deck clogging - Mower deck needs to be cleaned
Blades are too dull - Blades need to be sharpened
Defective or worn blades - Install new blades
Mowing speed is too high - Operate at slower speed
Cutting level is too low - Use correct cutting height
Full bagger - Bagger must be empty
Blades scalp the grass
Lawn is not level or bumpy - Level the lawn
Cutting height is too low - Use correct cutting height
High ground speed - Operate at slower speed
Incorrectly leveled mower deck - Deck needs to be adjusted properly
Bent or worn blades - Blades must be changed
Tires are not correctly inflated - Check and inflate the tires
Uneven cut
Tire pressure is too low - Need to inflate tires
Improperly leveled mower deck - Deck should be adjusted correctly
Blades are excessively dull - Blades need to be sharpened
Blades are defective or worn - Change the blades
Deck clogged with grass clippings - Clean mower deck as required
Broken mower deck housing - Repair or change the deck
Mower spindle is loose or defective - Install new spindle or repair it

Electrical Troubleshooting
Battery cannot be charged
Corroded or loose wire connections - Clean or tighten wiring connections
Defective battery terminal clamps - Install new terminal clamps
Battery is defective - Battery change required
Starter turns slowly
Low battery capacity - Battery needs to be recharged
Battery is not holding charge - Service battery or change it
Bad terminals or disconnected battery cables - Connect wires properly or change terminals
Starter is not working
Battery is low or faulty - Recharge or replace battery
Battery cables are disconnected or incorrectly connected - Check cables and connect as needed
Low battery output - Battery is drained, charge it
Spark plug faulty or incorrectly gapped - Replace or clean and gap
Faulty solenoid or starter motor - Starter/solenoid should be replaced



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